CN103684155A - Conversion device for wind power generation, and control device and control method for wind power generation - Google Patents
Conversion device for wind power generation, and control device and control method for wind power generation Download PDFInfo
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- CN103684155A CN103684155A CN201310328466.XA CN201310328466A CN103684155A CN 103684155 A CN103684155 A CN 103684155A CN 201310328466 A CN201310328466 A CN 201310328466A CN 103684155 A CN103684155 A CN 103684155A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The invention provides a conversion device for a wind power generation, and a control device and a control method for the wind power generation. Even if voltage drop happens on a power system, the power system can be still stable, so that a converter can be operated continuously. The conversion device for the wind power generation is provided with a system voltage calculator for determining a voltage state of the power system based on information of a system side voltage inductor, and an idle current instruction calculator for outputting idle current instructions based on information of a windmill control device (WTC). The idle current instruction calculator increases the outputted idle current temporally according to a proportion of the voltage drop of the power system, thus changing a time of the idle current following an instruction value.
Description
Technical field
The present invention relates to a kind of used for wind power generation converting means, used for wind power generation control device and control method.
Background technology
In recent years, along with the acceleration to renewable energy resources demand, the construction of wind power plant is constantly advancing all over the world.Its reason is that the cost of electricity-generating of wind power generation is cheap in renewable energy resources field.In wind power generation, generally, be thereby that wind energy that fin is subject to is converted to rotational and makes generator rotate to generate electricity, but because the moment along with wind speed and wind direction changes, the rotating speed of generator also changes thereupon, therefore utilizes power converter to resist such variation, to obtain the electric power of regulation.Used the generation technology of the wind power generation of such power converter to be for example documented in JP 2012-102698 communique.
Technical literature formerly
Patent documentation
Patent documentation 1: TOHKEMY 2012-102698 communique
The problem that invention will solve
In wind power generation, there is the voltage drop due to electric power system, cause between energy output and load out of balance, the situation that wind generator system stops.Especially, in the situation that the wind generator system as field of wind-force (wind farm) is concentrated outfit, aggravated the unbalanced of energy output and load, thereby be considered to likely to other wind generator system expansions.
Like this, in the control of used for wind power generation converter, in the situation that there is the voltage drop of electric power system, generally, exist electric power to control the difficulty that temporarily becomes, cause electricity generation system to become the problem of halted state.
Summary of the invention
The object of the invention is to, even if provide a kind of after having there is the voltage drop of electric power system, also can maintain the control method of used for wind power generation converting means, used for wind power generation control device and the used for wind power generation converting means of generating.
Solve the means of problem
In order to reach above-mentioned purpose, the invention provides a kind of used for wind power generation converting means, carry out power converter, make the generation power of the frequency of the regulation producing from Wind-driven rotating power offer electric power system, described used for wind power generation converting means has: system voltage operational part, it,, by the voltage of described electric power system being detected by system side voltage sensor, is judged the state of system voltage; Idle current ordering calculation portion,, in the situation that there is the voltage drop of regulation in described electric power system being detected, the idle current instruction that computing increases the idle current of described electric power system in its information based on described system voltage operational part; And current control division, it offers described electric power system according to described idle current instruction by idle current.
Invention effect
By the present invention, even if there is the voltage drop of electric power system, can not make wind generator system stop yet, thereby can maintain generating.
Accompanying drawing explanation
Fig. 1 is the key diagram of the power converter of embodiment 1.
Fig. 2 is the key diagram of the idle current ordering calculation device 1009 of embodiment 1.
Fig. 3 is the key diagram of the idle current ordering calculation device 1009 of embodiment 1.
Fig. 4 is the key diagram of the idle current ordering calculation device 1009 of embodiment 2.
Fig. 5 is the key diagram of the idle current ordering calculation device 1009 of embodiment 2.
Embodiment
Below, use accompanying drawing to describe embodiment.
[embodiment 1]
Use Fig. 1, Fig. 2 and Fig. 3 to describe the present embodiment.
< summary forms >
Power converter 1004 shown in Fig. 1 is the used for wind power generation power conversion systems that consist of a plurality of devices.Generator 1003 obtains the rotational of the flabellum 1001 of wind-engaging rotation by axle 1002, and the electric power occurring in 1006 pairs of power converter unit generator 1003 adjusts, thereby electric power is offered to electric power system 1005.
Power converter 1004 consists of power converter unit 1006 and control device 1007.Control device 1007 is transfused to the information from generating pusher side current sensor 1013, system side current sensor 1011, system side voltage sensor 1012 and windmill control device WTC.In addition, although there is shown each inscape of the control device 1007 of Fig. 1 at frame, control device 1007 also can consist of one or more computer, and each function also can consist of software.That is to say, each each function that is designated as " ... device " etc. is for example set up as the function of the part of one or more computer.
Power converter unit 1006 can be for example the output of generator 1003 to be carried out to the parts of power converter, can be also to being provided for the electric power of the rotor of generator 1003, the parts that namely electric power of so-called secondary excitation is controlled in addition.In the latter case, below the ACR of explanation is the instruction of electric power for offering the rotor of generator 1003.
< summary function >
Power converter unit 1006 shown in Fig. 1, the information by control device 1007 based on from each transducer and being controlled.The information of system side voltage operational device 1008 based on system side voltage sensor 1012, carrys out the variation of arithmetic system voltage, and operation result is exported to idle current arithmetic unit 1010 and idle current ordering calculation device 1009.
Idle current arithmetic unit 1010, the information based on from generating pusher side current sensor 1013, system side current sensor 1011 and system side voltage sensor 1012, calculates idle current, and exports to plus and minus calculation device 1014.
Idle current ordering calculation device 1009, information based on windmill control device WTC and system voltage arithmetic unit 1008, carry out computing idle current command value, and, according to the output of system voltage arithmetic unit 1008, the idle current instruction calculating by windmill control device WTC and the idle current instruction that calculates by system voltage arithmetic unit 1008 are switched, and export to plus and minus calculation device 1014.
Plus and minus calculation device 1014, calculates the current detection value from idle current arithmetic unit 1010 and the difference from the command value of idle current ordering calculation device 1009, and result of calculation is exported to inefficient power arithmetic unit AQR.
Inefficient power arithmetic unit AQR, the Output rusults based on plus and minus calculation device 1014, computing is used for controlling the controlled quentity controlled variable of electric power, and exports to current regulator ACR.
Current regulator ACR, the Output rusults based on inefficient power adjuster AQR, computing is used for controlling the controlled quentity controlled variable of electric current, and control signal is sent to power converter unit 1006.
Above-mentioned inefficient power adjuster AQR, current regulator ACR, consist of for example proportional integral device.
< detailed functions >
Use Fig. 2, Fig. 3, idle current ordering calculation device 1009 is described.
Fig. 2 represents the system voltage calculating by system voltage arithmetic unit 1008, the idle current calculating by idle current arithmetic unit and the relation of the idle current instruction that calculates by idle current ordering calculation device 1009.The situation that voltage drop has occurred in 1009 pairs of system voltage arithmetic units 1008 of idle current ordering calculation device detects, and when residual voltage is 90% when following, command value is set as to 100%.Now, for this command value, export idle current, but the time that exists idle current to follow command value is not controlled situation at the appointed time as the time of following 1.In this case, command value is multiplied by certain multiplying power, command value is increased within a certain period of time, thereby the time of following of idle current can be controlled at the appointed time as the time of following 2.Herein, 90%, 100%, example, also can select according to the characteristic of each generator other numerical value.In the following examples too.
Fig. 3 represents the handling process of idle current ordering calculation device 1009.In idle current ordering calculation device 1009, when the information of system voltage arithmetic unit 1008 is transfused to, judge 3001 judgement.Not meeting judge 3001 in the situation that, carry out computing 3004 and also by maintaining described idle current instruction, in the information of specified idle current instruction 0%, export to plus and minus calculation device 1014.Meeting judge 3001 in the situation that, carry out and judge 3002.Meeting judge 3002 in the situation that, carry out computing 3005 and also by maintaining described idle current instruction, in the information of specified idle current instruction 0%, export to plus and minus calculation device 1014.Not meeting judge 3002 in the situation that, carry out and judge 3003.Meeting judge 3003 in the situation that, carry out computing 3006 and also by maintaining described idle current instruction, in 100% information, export to plus and minus calculation device 1014.Do not meeting judge 3003 in the situation that, will carry out the result of calculating 3007 (command value=100% * multiplying power, command value increase time=follow the time 1-stipulated time) as idle current instruction, and export to plus and minus calculation device 1014.
In the present embodiment 1, owing to possessing described < detailed functions >, therefore, when power system voltage declines, can make wind generator system continue operation.
In above-mentioned situation, there is following technical characterictic: (1), according to the ratio of the voltage drop of electric power system, changes offering the idle current of electric power system; (2) while idle current being offered to electric power system, detect idle current within certain set time and do not arrive idle current instruction, and export temporary transient over proof idle current instruction; (3) when idle current being offered to electric power system, detect idle current within certain set time and do not reach idle current instruction, export temporary transient over proof idle current instruction, and, to output time change; Or when (4) idle current being offered to electric power system, detect idle current within certain set time and do not reach idle current instruction, export temporary transient over proof idle current instruction, and, time to the instruction of output idle current changes, because idle current reaches command value, thereby idle current instruction is returned to specified.
In addition, in the situation that to idle current, instruction changes, if can realize the such control of Fig. 2, can revisal command value, or also can be replaced as other command value.
[embodiment 2]
Use Fig. 1, Fig. 4, Fig. 5 to describe the present embodiment.
< summary forms >
Identical with embodiment 1
< summary function >
Identical with embodiment 1
< detailed functions >
Use Fig. 4, Fig. 5, idle current ordering calculation device 1009 is described.
Fig. 4 represents by the relation of the system voltage of system voltage arithmetic unit 1008 computings, the idle current calculating by idle current calculator and the idle current instruction of calculating by idle current ordering calculation device 1009.The situation that voltage drop has occurred in 1009 pairs of system voltage arithmetic units 1008 of idle current ordering calculation device detects, and when residual voltage is 90% when following, command value is set as to 100%.Now, for this command value, in the situation that the gradient of idle current is larger than gradient A, command value is multiplied by certain multiplying power, by increasing within a certain period of time command value, can reduces the gradient of idle current and restrain at the appointed time.Herein, 90%, 100%, example, also can select in conjunction with the characteristic of each generator other numerical value.In the following examples too.
[formula]
The gradient A=100% ÷ stipulated time
Fig. 5 represents the handling process of idle current ordering calculation device 1009.In idle current ordering calculation device 1009, when the information of system voltage arithmetic unit 1008 is transfused to, judge 5001 judgement.Not meeting judge 5001 in the situation that, carry out computing 5004 and also by maintaining described idle current instruction, in the information of specified idle current instruction 0%, export to plus and minus calculation device 1014.Meeting judge 5001 in the situation that, carry out and judge 5002.Meeting judge 5002 in the situation that, carry out computing 5005 and also by maintaining described idle current instruction, in the information of specified idle current instruction 0%, export to plus and minus calculation device 1014.Not meeting judge 5002 in the situation that, carry out and judge 5003.Meeting judge 5003 in the situation that, carry out computing 5006 and also by maintaining described idle current instruction, in 100% information, export to plus and minus calculation device 1014.Do not meeting judge 5003 in the situation that, will carry out the result of calculating 5007 (command value=100% * multiplying power, m-stipulated time during command value increase time=follow) as idle current instruction, and export to plus and minus calculation device 1014.
In the present embodiment 2, owing to possessing described < detailed functions >, therefore, when power system voltage declines, can make wind generator system continue operation.
Symbol description
1001 flabellums
1002 axles
1003 generators
1004 power converters
1005 electric power systems
1006 power converter unit
1007 control device
1008 system voltage arithmetic units
1009 idle current ordering calculation devices
1010 idle current arithmetic units
1011 system side current sensors
1012 system side voltage sensors
1013 generating pusher side current sensors
1014 Add-subtract calculators
ACR current regulator
AQR inefficient power adjuster
WTC windmill control device
3001,3002,3003,5001,5002,5003 judge
3004,3005,3006,3007,5004,5005,5006,5007 computings.
Claims (7)
1. a used for wind power generation converting means, carries out power converter, makes the generation power of the frequency of the regulation being produced by Wind-driven rotating power offer electric power system, and described used for wind power generation converting means has:
System voltage operational part, it,, by the voltage of described electric power system being detected by system side voltage sensor, is judged the state of system voltage;
Idle current ordering calculation portion,, in the situation that there is the voltage drop of regulation in described electric power system being detected, the idle current instruction that computing increases the idle current of described electric power system in its information based on described system voltage operational part; With
Current control division, it offers described electric power system according to described idle current instruction by idle current.
2. used for wind power generation converting means according to claim 1, is characterized in that,
According to the ratio of the voltage drop of described electric power system, to offering the idle current of described electric power system, change.
3. wind-force converting means according to claim 1, is characterized in that,
When idle current is offered to described electric power system, detect idle current within certain set time and do not reach the situation of idle current instruction, and export temporary transient over proof idle current instruction.
4. wind-force converting means according to claim 1, is characterized in that,
When idle current is offered to described electric power system, detect the situation that within certain set time idle current does not reach idle current instruction, export temporary transient over proof idle current instruction, and the time of output is changed.
5. wind-force converting means according to claim 1, is characterized in that,
When idle current is offered to described electric power system, detect the situation that within certain set time idle current does not reach idle current instruction, export temporary transient over proof idle current instruction, and, to exporting the time of described idle current instruction, change, because described idle current reaches command value, thereby described idle current instruction is returned to specified.
6. a used for wind power generation control device, supplies with and controls electric power, makes the generation power of the frequency of the regulation being produced by Wind-driven rotating power offer electric power system, and described used for wind power generation control device has:
System voltage operational part, it,, by the voltage of described electric power system being detected by system side voltage sensor, is judged the state of system voltage;
Idle current command calculations portion, it detects in the situation of the voltage drop that regulation has occurred in described electric power system in the information based on described system voltage operational part the idle current instruction that computing increases the idle current of described electric power system; With
Current control division, it offers described electric power system according to described idle current instruction by idle current.
7. a control method for used for wind power generation converting means, is characterized in that,
By the voltage of electric power system being detected by system side voltage sensor, judge the rotational based on wind-force and be provided the state of system voltage of electric power of the frequency of regulation, and in the information based on described system voltage operational part, detect in the situation of the voltage drop that regulation has occurred in described electric power system, operational order realizes and provides idle current to described electric power system increase.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-189421 | 2012-08-30 | ||
| JP2012189421A JP2014050162A (en) | 2012-08-30 | 2012-08-30 | Conversion device for windmill, control device for windmill, method for controlling conversion device for windmill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103684155A true CN103684155A (en) | 2014-03-26 |
| CN103684155B CN103684155B (en) | 2017-04-26 |
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| CN201310328466.XA Active CN103684155B (en) | 2012-08-30 | 2013-07-31 | Conversion device for wind power generation, and control device and control method for wind power generation |
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| KR101701293B1 (en) * | 2015-02-02 | 2017-02-01 | 두산중공업 주식회사 | Wind turbine and Method for LVRT control of wind turbine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003189479A (en) * | 2001-12-17 | 2003-07-04 | Toshiba Corp | Generated power controller in power sending system |
| CN101316091A (en) * | 2007-05-30 | 2008-12-03 | 株式会社日立制作所 | Wind power generation system and method of controlling power converter |
| CN102318182A (en) * | 2009-05-01 | 2012-01-11 | 三菱重工业株式会社 | Power generating device and control method therefor |
| WO2012039034A1 (en) * | 2010-09-22 | 2012-03-29 | 東芝三菱電機産業システム株式会社 | Power conversion device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4734213B2 (en) * | 2006-10-17 | 2011-07-27 | 東海旅客鉄道株式会社 | AC voltage control method using power converter or reactive power compensator |
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- 2012-08-30 JP JP2012189421A patent/JP2014050162A/en active Pending
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003189479A (en) * | 2001-12-17 | 2003-07-04 | Toshiba Corp | Generated power controller in power sending system |
| CN101316091A (en) * | 2007-05-30 | 2008-12-03 | 株式会社日立制作所 | Wind power generation system and method of controlling power converter |
| CN102318182A (en) * | 2009-05-01 | 2012-01-11 | 三菱重工业株式会社 | Power generating device and control method therefor |
| WO2012039034A1 (en) * | 2010-09-22 | 2012-03-29 | 東芝三菱電機産業システム株式会社 | Power conversion device |
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| JP2014050162A (en) | 2014-03-17 |
| CN103684155B (en) | 2017-04-26 |
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Effective date of registration: 20191226 Address after: Tokyo, Japan Patentee after: Hitachi Industrial Machinery Co., Ltd Address before: Tokyo, Japan Patentee before: Hitachi Production Co., Ltd. |